1 of 6

“Why Do Those Wrap

Around Spools?”

Important Note:

If you can see this box, then the slide show is not playing and the reveal won’t work.

​

Here is the solution:

​

If you are using PowerPoint, click on Slide Show, then click on From Current Slide.

​

If you are using Google Slides, click on View then Present.

www.stevewyborney.com

Steve Wyborney

2 of 6

As the clues appear, use the information to narrow the possibilities to a smaller set. After each clue, use estimation again to determine which of the remaining answers is the most reasonable.

How many spool holders

are in the cup?

Write down your first estimate. After each clue, you’ll see if your estimate is still a possibility. After each clue, if it is no longer possible write down a new estimate – and be prepared to explain why you chose it.

www.stevewyborney.com

Steve Wyborney

3 of 6

1

2

3

4

5

6

7

8

9

10

11

12

13

14

15

16

17

18

19

20

21

22

23

24

25

26

27

28

29

30

1

2

3

4

5

6

7

8

9

10

11

12

13

14

15

16

17

18

19

20

21

22

23

24

25

26

27

28

29

30

1

2

3

4

5

6

7

8

9

10

11

12

13

14

15

16

17

18

19

20

21

22

23

24

25

26

27

28

29

30

1

2

3

4

5

6

7

8

9

10

11

12

13

14

15

16

17

18

19

20

21

22

23

24

25

26

27

28

29

30

1

2

3

4

5

6

7

8

9

10

11

12

13

14

15

16

17

18

19

20

21

22

23

24

25

26

27

28

29

30

Clue #1

Clue #2

Clue #3

Clue #4

Clue #5

Clue #1

The answer is a 2-digit number

that is less than 30.

Clue #2

The answer does not include

the digit 1.

Clue #3

Eliminate 2 numbers with this clue.

​

32, 31, 30, ____ , ____

Clue #4

The answer is not 22 or 23.

Clue #5

The answer is not 25,

or 1 less than 25,

or 1 more than 25.

www.stevewyborney.com

Steve Wyborney

1

2

3

4

5

6

7

8

9

10

11

12

13

14

15

16

17

18

19

20

21

22

23

24

25

26

27

28

29

30

4 of 6

After seeing the clues, you have narrowed the possibilities to a small set of numbers. Before you see the answer, select your final estimate. Write it down, and explain to someone why you chose that number.

www.stevewyborney.com

Steve Wyborney

5 of 6

27 spool holders

The Reveal

Click to see the answer.

Important Note:

If you can see this box, then the slide show is not playing and the reveal won’t work.

​

Here is the solution:

​

If you are using PowerPoint, click on Slide Show, then click on From Beginning.

​

If you are using Google Slides, click on View then Present.

www.stevewyborney.com

Steve Wyborney

6 of 6

80 Cube Conversations

Lessons

The Original

50 Splat! Lessons

The Original 20 Fraction Splat! Lessons

More Free, Downloadable Resources From Blog Posts

20 Days of Number Sense

& Rich Math Talk

The Original 40 Estimation Clipboard Sets

51 Esti-Mysteries

The Multiplication Course (a free course for students and teachers)

​

For more information read the blog post about The Multiplication Course here.

​

To view the course on YouTube:

  1. Click here to see the chapter playlists on my YouTube channel.
  2. You’ll see all 12 chapters in the course.
  3. Each chapter includes a sequence of lessons for students.

Part 2 - New Esti-Mysteries and Number Sense Resources Every Day for the Rest of the School Year

New Esti-Mysteries and Number Sense Resources Every Day

for the Rest of the School Year

Part 3 - New Esti-Mysteries and Number Sense Resources Every Day for the Rest of the School Year

Part 4 - New Esti-Mysteries and Number Sense Resources Every Day for the Rest of the School Year

Daily Resources Posted in the 2020-2021 School Year

Click here to find

“More Estimation Clipboards.”

Click here to find

“150 New Esti-Mysteries.”

Daily Resources Posted in the 2021-2022 School Year